金沙地区含铝岩系中锂元素富集特征浅析

Analysis on the Enrichment Characteristics of Lithium in Aluminium-bearing Rock Series in Jinsha County

厘清金沙地区下石炭统九架炉组铝质黏土岩系中锂的富集机制,为锂资源的综合利用与评价提供参考依据。文本评价金沙县坪子上和桶井研究区的锂资源经济价值,研究含铝岩系化学元素在平面和垂向上的分布特征,并分析化学元素的相关性。结果表明,坪子上研究区平面上Li_(2)O呈北高南低、桶井研究区呈西北高东南低。垂向上,Li_(2)O含量在1000×10^(-6)-1999×10^(-6)的样品占分析样品总数的16.87%、在2000×10^(-6)-2999×10^(-6)的样品占分析样品总数的5.42%、在>3000×10^(-6)的锂样品占分析样品总数的1.81%,Li_(2)O在铝土岩中最为富集,其次为粘土岩、铝土矿。Li_(2)O与Al_(2)O_(3)(r=0.40)、TiO_(2)(r=0.43)呈正相关,Li_(2)O与SiO_(2)(r=-0.33)、TFe_(2)O_(3)(r=-0.20)呈负相关,Li_(2)O与A/S(铝硅比)(r=0.04)、岩层厚度(r=-0.07)无相关关系。

To clarify the enrichment mechanism of lithium in the aluminous clay rock series of the Lower Carboniferous Jiujialu Formation in Jinsha area,and provide reference for the comprehensive utilization and evaluation of lithium resources.This paper evaluates the economic value of lithium resources in Pingzishang and Bucket Jing research area of Jinsha County,studies the distribution characteristics of chemical elements in horizontal and vertical space of aluminium-bearing rock series,and analyzes the correlation of chemical elements.The results show that lithium resources in the study area have no industrial value.Lithium resources are high in the north and low in the south in the Pingzishang,and high in the northwest and low in the southeast in the Tongjing.Vertically,samples with Li_(2)O content of 1000×10^(-6)-1999×10^(-6)accounted for 16.87%of the total analysis samples,samples with 2000×10^(-6)-2999×10^(-6)accounted for 5.42%,and lithium samples with content of>3000×10^(-6)accounted for 1.81%.Li_(2)O is the most abundant in bauxite,followed by clay rock and bauxite.Li_(2)O is positively correlated with Al_(2)O_(3)(r=0.40)and TiO_(2)(r=0.43),negatively correlated with SiO_(2)(r=-0.33)and TFe_(2)O_(3)(r=-0.20),and has no correlation with A/S(aluminum-silicon ratio)and rock layer thickness.